UHF circuits

  

 

Ultra High Frequency (UHF) designates the ITU Radio frequency range of electromagnetic waves between 300 MHz and 3 GHz (3,000 MHz), also known as the decimetre band or decimetre wave as the wavelengths range from one to ten decimetres (10 cm to 1 metre).
 
Radio waves with frequencies above the UHF band fall into the SHF (super high frequency) and EHF (extremely high frequency) bands, all of which fall into the microwave frequency range. Lower frequency signals fall into the VHF (very high frequency) or lower bands. See Electromagnetic spectrum and Radio spectrum for a full listing of frequency bands.
 
The main advantage of UHF transmission is the physically short wave that is produced by the high frequency. The size of transmission and reception antennas is related to the size of the radio wave. The UHF antenna is stubby and short. Smaller and less conspicuous antennas can be used with higher frequency bands.
The major disadvantage of UHF is its limited broadcast range and reception, often called line-of-sight between the TV station's transmission antenna and customer's reception antenna, as opposed to VHF's very long broadcast range and reception, which is less restricted by line of sight.
 
The majority of digital TV stations currently broadcast their over-the-air signals in the UHF band, both because VHF had been largely already filled with analog TV at the time the digital facilities were built and because of severe issues with impulse noise on digital low-VHF channels. While virtual channel numbering schemes routinely display channel numbers like "2.1" or "6.1" for individual North American terrestrial HDTV broadcasts, these are more often than not actually UHF signals. Many equipment vendors therefore use "HDTV antenna" or similar branding as all but synonymous to "UHF antenna".
 
 








Circuits


Electronic Circuit Diagrams & Schematics: Simple Uhf Tv-Line Amplifier Circuit Diagram - Totally Free Electronic Circuits, Diagrams,Schematics and Projects. We make free Electronic work for student...

Electronic Circuit Diagrams & Schematics: Affordable Vhf-Uhf Diode Rf Switch Circuit Diagram - Totally Free Electronic Circuits, Diagrams,Schematics and Projects. We make free Electronic work for s...

Electronic Circuit Diagrams & Schematics: Build a Uhf TV Preamplifier Circuit Diagram - Totally Free Electronic Circuits, Diagrams,Schematics and Projects. We make free Electronic work for student ...

4-Ch UHF remote control mains rated SPDT relay board electronic kit and key fob set. Momentary or Toggle. Reset Inputs. Up to 15 fobs to 1 receiver.

Nonstop-Free Electronic Circuits Project Diagram and Schematics ... RF Circuits. This is the simple project of RF Amplifier using VHF and UHF MAR-6 Circuit Diagram. This circuit broadband RF amplif...

A very simple VHF UHF Low-Noise amplifiers circuit can be designed using the MAX2664 and MAX2665 ultra-compact LNAs for VHF. ... Nonstop-Free Electronic Circuits Project Diagram and Schematics · Ho...